Sorry if it's been mentioned earlier, but if one had to chose between PS3 or XBox360, which would you chose (and why)?
Don't have either console at the current moment but what I've seen of this game, that may change shortly.
If you're picking up a console
just for GTA, just go with whatever console is cheaper, factoring in the $60 (or whatever it is) that you would have to pay for XBL Gold. In other words, if you can get a 360 for $60+ less than a PS3, then get a 360. Otherwise get the PS3.
If you're going to play other games down the road, take a look at their respective libraries. Xbox has Halo, Gears, Forza, Alan Wake, Left 4 Dead, and a few others. Playstation has Uncharted, God of War, The Last of Us, inFamous, Gran Turismo, Killzone, and a few others. Go with whichever console has the more appealing lineup.